Here's a problem - when playing in fullscreen, after Alt+Tabbing to a desktop, the whole display picture is distorted (photo is below). The resolution must be the same as desktop. When returning back to the game, the picture restores. After closing the game everything's fine again. Sometimes after returning to the game the screen flickers, though the picture itself is OK.
OS: Windows XP SP3, video integrated, ATI Xpress 1100.
Below are the photo of the distorted screen and how it should look like (as appeared after ending a game).
P.S. Sorry guys, I checked it on Teeworlds, and it gave the same results. Looks like an SDL problem (or in conjunction with ATI drivers)...